Year	Number
2004-01-01	4.1559
2005-01-01	3.9991
2006-01-01	4.0594
2007-01-01	4.3283
2008-01-01	5.7626
2009-01-01	7.1369
2010-01-01	8.5904
2011-01-01	9.5413
2012-01-01	10.0487
2013-01-01	10.3476
2014-01-01	9.1222
2015-01-01	10.1542
2016-01-01	10.1343